Th (A) 112 1.2 Ω (D) 3x 10's to increase the length by 10% of its initial value. (C)44Q 4.840 St. An electric toaster has the heating element made of nichrome. When a negligibly small current is passed connected to a 230 V supply, the current settles, after some time, to a steady value of 2.68 A. The steady through it, its resistance at room temperature (27 °C) is found to be 75.3 Q. When the toaster is temperature of the nichrome element is [Take temperature co-efficient of resistance of nichrome as 1.7 x 10 °C-11. (A) 820 °C (B) 847 °C (C) 1120 °C (D) 820 °C 52. The resistance of a copper coil at 100 °C is found to be 5.6 2. If temperature co-efficient of resistance of copper is 4 x 10-3/°C, the resistance of the coil at 0°C is (Α) 5 Ω (Β) 4 Ω (C) 4.5 Ω (D) 1.4Q 53. The temperature coefficient of resistance of the material of a wire is 0.001 per °C. Its resistance at 300 K is 1 ohm. The resistance will be 2 ohm at a temperature of (A) 781 K (B) 1027 K (C) 1054 K (D) 1327 K 54. I and V are respectively the current and voltage in a metal wire of resistance R. The I-V graph for the two different temperatures T1 and T2 are given. Then (A) T₁ = T₂ T₁>T₂ (C) T₁ Slope T₂ R>R₂ 55. A heating coil rated as 100 W, 200 V is cut into two identical parts and the two parts are then joined in Hross a source of 200 V. The heat energy dissipated by the combination per second is 1001 (C) 50 J (D) 50 J BAS ined Ex
Th (A) 112 1.2 Ω (D) 3x 10's to increase the length by 10% of its initial value. (C)44Q 4.840 St. An electric toaster has the heating element made of nichrome. When a negligibly small current is passed connected to a 230 V supply, the current settles, after some time, to a steady value of 2.68 A. The steady through it, its resistance at room temperature (27 °C) is found to be 75.3 Q. When the toaster is temperature of the nichrome element is [Take temperature co-efficient of resistance of nichrome as 1.7 x 10 °C-11. (A) 820 °C (B) 847 °C (C) 1120 °C (D) 820 °C 52. The resistance of a copper coil at 100 °C is found to be 5.6 2. If temperature co-efficient of resistance of copper is 4 x 10-3/°C, the resistance of the coil at 0°C is (Α) 5 Ω (Β) 4 Ω (C) 4.5 Ω (D) 1.4Q 53. The temperature coefficient of resistance of the material of a wire is 0.001 per °C. Its resistance at 300 K is 1 ohm. The resistance will be 2 ohm at a temperature of (A) 781 K (B) 1027 K (C) 1054 K (D) 1327 K 54. I and V are respectively the current and voltage in a metal wire of resistance R. The I-V graph for the two different temperatures T1 and T2 are given. Then (A) T₁ = T₂ T₁>T₂ (C) T₁ Slope T₂ R>R₂ 55. A heating coil rated as 100 W, 200 V is cut into two identical parts and the two parts are then joined in Hross a source of 200 V. The heat energy dissipated by the combination per second is 1001 (C) 50 J (D) 50 J BAS ined Ex
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter21: Current And Direct Current Circuits
Section: Chapter Questions
Problem 19P
Related questions
Question
100%
Answer to 53
Transcribed Image Text:Th
(A) 112
1.2 Ω
(D) 3x 10's
to increase the length by 10% of its initial value.
(C)44Q
4.840
St. An electric toaster has the heating element made of nichrome. When a negligibly small current is passed
connected to a 230 V supply, the current settles, after some time, to a steady value of 2.68 A. The steady
through it, its resistance at room temperature (27 °C) is found to be 75.3 Q. When the toaster is
temperature of the nichrome element is [Take temperature co-efficient of resistance of nichrome as
1.7 x 10 °C-11.
(A) 820 °C
(B) 847 °C
(C) 1120 °C
(D) 820 °C
52. The resistance of a copper coil at 100 °C is found to be 5.6 2. If temperature co-efficient of resistance of
copper is 4 x 10-3/°C, the resistance of the coil at 0°C is
(Α) 5 Ω
(Β) 4 Ω
(C) 4.5 Ω
(D) 1.4Q
53. The temperature coefficient of resistance of the material of a wire is 0.001 per °C. Its resistance at 300 K
is 1 ohm. The resistance will be 2 ohm at a temperature of
(A) 781 K
(B) 1027 K
(C) 1054 K
(D) 1327 K
54. I and V are respectively the current and voltage in a metal wire of resistance R. The I-V graph for the two
different temperatures T1 and T2 are given. Then
(A) T₁ = T₂
T₁>T₂
(C) T₁<T₂
(D) T₁ = 2T2
Slope of T₁ > Slope T₂
R>R₂
55. A heating coil rated as 100 W, 200 V is cut into two identical parts and the two parts are then joined in
Hross a source of 200 V. The heat energy dissipated by the combination per second is
1001
(C) 50 J
(D) 50 J
BAS
ined Ex
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