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A car battery is charge by a 12 V supply and energy stored it is 7.20 10 J. The charge passed throuh the battery is:
The energy stored in the battery is given as 7.20 × 10⁴ J, and the supply voltage is 12 V. Using the formula Energy (E) = Charge (Q) × Voltage (V), we find: Q = E/V = (7.20 × 10⁴ J) / (12 V) = 6.0 × 10⁴ C Thus, the correct answer is (a) 6.0 × 10⁴ C. For more visit here: https://www.tiwariacademy.comRead more
The energy stored in the battery is given as 7.20 × 10⁴ J, and the supply voltage is 12 V. Using the formula Energy (E) = Charge (Q) × Voltage (V), we find:
Q = E/V = (7.20 × 10⁴ J) / (12 V) = 6.0 × 10⁴ C
Thus, the correct answer is (a) 6.0 × 10⁴ C.
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Kirchhoff’s junction rule is a reflection of
Kirchhoff’s junction rule is a reflection of (B) conservation of charge. It states that the total current entering a junction equals the total current leaving, ensuring no charge accumulation. This follows from the principle that charge cannot be created or destroyed at a junction, making conservatiRead more
Kirchhoff’s junction rule is a reflection of (B) conservation of charge. It states that the total current entering a junction equals the total current leaving, ensuring no charge accumulation. This follows from the principle that charge cannot be created or destroyed at a junction, making conservation of charge the fundamental basis of this rule.
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Temperature dependence of resistivity p(T) of semiconductors, insulators and metals is significantly based on the following factors :
The temperature dependence of resistivity ρ(T) in semiconductors, insulators and metals is primarily influenced by: (a) Number of charge carriers can change with temperature T (especially in semiconductors and insulators). (b) Time interval between successive collisions depends on T (affecting electRead more
The temperature dependence of resistivity ρ(T) in semiconductors, insulators and metals is primarily influenced by:
(a) Number of charge carriers can change with temperature T (especially in semiconductors and insulators).
(b) Time interval between successive collisions depends on T (affecting electron scattering).
Thus, the correct answers are (a) and (b).
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A uniform wire of resistance 2 R is bent in the form of a circle. The effective resistance between the ends of any diameter of the circle is
When the wire of resistance 2 R is bent into a circle, each semicircular half has resistance R. These two halves are in parallel when measured across a diameter. The effective resistance is given by: 1/Reff = 1/R + 1/R Reff = R /2 Thus, the correct answer is (b) R/2. For more visit here: https://wwwRead more
When the wire of resistance 2
R is bent into a circle, each semicircular half has resistance
R. These two halves are in parallel when measured across a diameter. The
effective resistance is given by:
1/Reff = 1/R + 1/R
Reff = R /2
Thus, the correct answer is (b) R/2.
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See lessThree resistors having values R₁, R₂ and R₃ are connected in series to a battery. Suppose R₁ carries a current 2.0 A, R₂ has a resistance 3-0 ohm and R₃ dissipates 6.0 watt of power. Then voltage across R₃ is :
In a series circuit, the current remains the same across all resistors. Given that R₁ carries 2.0 A, R₃ also has 2.0 A. Power dissipated by R₃ is given by P = I² R. Solving 6 = (2)² R₃, we get R₃ = 1.5 ohm. Voltage across R₃ is V = IR = 2 × 1.5 = 3V. Answer: (c) 3 V. For more visit here: https://wwwRead more
In a series circuit, the current remains the same across all resistors. Given that
R₁ carries 2.0 A,
R₃ also has 2.0 A. Power dissipated by
R₃ is given by
P = I² R. Solving 6 = (2)² R₃, we get
R₃ = 1.5 ohm. Voltage across
R₃ is V = IR = 2 × 1.5 = 3V. Answer: (c) 3 V.
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