4) A transformer is a device used to A) increase or decrease an ac voltage. B) transform a direct current into an alternating current. C) increase or decrease a dc voltage. D) transform an alternating current into a direct current.

Q: 1) A plastic rod is charged up by rubbing a wool cloth, and brought to an initially neutral metallic…

A: Correct answer is option ClB The rod is repelled by the sphere

Q: 18) Two isolated copper plates, each of area 0.40 m², carry opposite charges of magnitude 7.08 x…

A: The correct answer is option B Potential difference = 8 V

Q: How many electrons are necessary to produce 1.0 C of negative charge? (e=1.60 x 10-19 C) A) 6.3 x…

A: We know thatQ=neWhereQ=chargen=number of electronse=charge of electron

Q: The figure shows electric field lines arising from two small charged particles P and Q. Consider the…

A:

Q: 18) A bar magnet is pushed through a coil of wire of cross-sectional area 0.020 m² as shown in the…

A: Given : Area (A) = 0.020 m2 Number of turns (N) = 7 Rate of change of strength of magnetic field :…

Q: 12) A bar magnet is oriented above a copper ring, as shown in the figure. The magnet is dropped and…

A: According to lenz's law Induced emf always opposes the cause by which it is produced.

Q: 7) The magnetic field at a distance of 2 cm from a long straight current-carrying wire is 4 μT. What…

A: The magnetic field at a distance r1=2 cm from the straight long current carrying wire is B1=4μT…

Q: 13) In the figure, a bar magnet moves away from the solenoid. The direction of the induced current…

A: We have a solenoid with a resistor connected to it and a bar magnet whose south pole is moved away…

Q: 29) A 10-A current flows through a wire for 2.0 min. (e=1.60 x 10-19 C) (a) How much charge has…

A: Given Current through the wire,I=10A Time, t=2 min=120s Charge of the electrons is find by the…

Q: 3. (II) Sketch a PV diagram of the following process: 2.5 L of ideal gas at atmospheric pressure is…

A: The first process of the cycle is a constant pressure process in which the temperature of the ideal…

Q: 11) As a proton moves in a direction perpendicular to the electric field lines A) it is moving from…

A: Given  Proton moves direction perpendicular to the electric field .  Electric potential for moving…

Q: two.-. Analyze the following graph that shows the propagation of a wave, whose period is 8 seconds.…

A:

Q: 25) Which one of the following quantities is equivalent to 1 W? A) 1V/A B) 10.m C) 1A.s D) 1V.A E)…

A: Introduction: The electrical power is defined as the rate of electrical energy per unit time, and…

Q: 5) The electric field at point P due to a point charge Q a distance R away from P has magnitude E.…

A: Given : Electric field at point P due to a point charge Q , at a distance R away from P has…

Q: 13. (I) Determine the direction of B for each case in Fig. 20-53, where F represents the maximum…

A: Given, three cases in which direction of maximum magnetic force as well as direction of velocity on…

Q: A child drops a toy with a mass of 200 g from the balcony of a building 20 m as tall as he is,…

A: Given:m =200gxo=20mt=3sg=9.8 m/s2vo=0 m/s

Q: 2) A negatively-charged plastic rod is brought close to (but does not touch) a neutral metal sphere…

A: The correct answer is option A The sphere is now positively charged

Q: 3) Two tiny beads are 25 cm apart with no other charges or fields present. Bead A carries 10 µC of…

A: Option A is the correct answer

Q: 3. (I) A 240-m length of wire stretches between two towers and carries a 120-A current. Determine…

A: Given, length of wire = 240 m current = 120 A earth's magnetic field, B = 5 x 10-5 T angle between…

Q: 2. A 80uc charge is placed at the origin. A -40uC charge is placed at x = 2 m and a 220uC is placed…

A: Given 80uc charge is placed at the origin. And charge is - 40uc and 220uC and 80uC placed at x=2 and…

Q: At a particular point near a second charge, a 50 microcoulomb charge experiences a force of 2.0 N.…

A: The relation between the electric force and the electric field is given by  F =q E  where, q is the…

Q: 35) What is the equivalent resistance between points A and B of the network shown in the figure? A…

A:

Q: A rectangular coil, with corners labeled ABCD, has length L and width w. It is placed between the…

A:

Q: Two very small +3.00-uC charges are at the ends of a meter stick. Find the electric potential…

A: Given data:  Two very small charges Placed at ends of the meter stick  q = +3.00 μC = +3.00×10-6 C k…

Q: Consider a 6- µF capacitor with air between its plates. What is its capacitance when dry wax with a…

A: The capacitance of capacitor with the air gap between plates is  C=Aε0d Here A is area, d is…

Q: 10) Two long parallel wires separated by 7.5 cm each carry 3.3 A in opposite directions. (40 = 4 x…

A:

Q: A positive charge is moving to the right and experiences an upward magnetic force, as shown in the…

A: Force on charge particle in magnetic field F̅ = q(v̅×B̅)  direction of force can be determined using…

Q: 20) An ideal transformer has 60 turns on its primary coil and 300 turns on its secondary coil. If…

A: Given Data, Number of turns in primary coil (Np)=60 Number of turns in secondary coil(Ns)=300…

Q: Each plate of an ideal air-filled parallel-plate capacitor has an area of 0.0010 m², and the…

A: Given data:  Plate Area (A) = 0.0010 m2 Separation (d) = 0.050 mm = 0.050×10-3 m ε0 = 8.85×10-12…

Q: 4) A small charged plastic ball is vertically above another charged small ball in a frictionless…

A:

Q: (9) A conducting rod of length l= 25 cm is placed on a U-shaped metal wire that is connected to a…

A: Given  length(l)=0.25 m resistance (R)=8.0 ohms magnetic field (B)=0.40 T speed (v)=6.0 m/s Required…

Q: Direction: Draw a schematic diagram of the following:

A: Here is the complete image

Q: 1) A plastic rod is charged up by rubbing a wool cloth, and brought to an initially neutral metallic…

A: Here according to the steps given, we may say 1) The plastic rod is charged by rubbing a woolen…

Q: 30) Four unequal resistors are connected in a parallel with each other. Which one of the following…

A: in this question we use combination of resistors with parallel with each other.

Q: A circuit is constructed with five resistors and a battery as shown. The battery voltage is V = 12…

A:

Q: A flat coil having 40 turns, each one of cross-sectional area 12.0 cm², is oriented with its plane…

A:

Q: 2. The heating element of a flat iron provides a resistance of 32 n when plugged into a common 220 V…

A: given R=32ΩV=220VWe know that,P=V2R

Q: 6) If we double the resistance in a circuit but keep the current in it constant, the power…

A: Given data,  Final Resistance(R2)=2×Initial Resistance (R1) Final Current(I2)=Initial Current (I1)

Q: 19) The equipotential surfaces for two point charges are shown in the figure, with the value of…

A: