Q48. A car has a fresh storage battery of e.m.f. 15 V and internal resistance 4 x 10⁻² Ω. If the sta

Q: What is the correct answer for CUET UG Physics Q48?

The correct answer is b. The terminal voltage (V) of a battery is the voltage measured across its terminals when it is supplying current. It is related to the battery's electromotive force (EMF, E), the current drawn (I), and its internal resistance (r) by the formula V = E - Ir. Given: EMF E = 15 V, internal resistance r = 4 × 10⁻² Ω = 0.04 Ω, and current I = 85 A. Substitute these values into the formula: V = 15 V - (85

Q: Q48. A car has a fresh storage battery of e.m.f. 15 V and internal resistance 4 x 10⁻² Ω. If the starter motor draws a current of 85 A, what is the terminal voltage of the battery when the starter is…

The correct answer is b. The terminal voltage (V) of a battery is the voltage measured across its terminals when it is supplying current. It is related to the battery's electromotive force (EMF, E), the current drawn (I), and its internal resistance (r) by the formula V = E - Ir. Given: EMF E = 15 V, internal resistance r = 4 × 10⁻² Ω = 0.04 Ω, and current I = 85 A. Substitute these values into the formula: V = 15 V - (85

Q: What are the options for this CUET UG Physics question?

A. 3.4 V · B. 11.6 V · C. 12 V · D. 12.5 V

Question

Q48. A car has a fresh storage battery of e.m.f. 15 V and internal resistance 4 x 10⁻² Ω. If the starter motor draws a current of 85 A, what is the terminal voltage of the battery when the starter is on?

FirstInTest · Accepted Answer

The terminal voltage (V) of a battery is the voltage measured across its terminals when it is supplying current. It is related to the battery's electromotive force (EMF, E), the current drawn (I), and its internal resistance (r) by the formula V = E - Ir. Given: EMF E = 15 V, internal resistance r = 4 × 10⁻² Ω = 0.04 Ω, and current I = 85 A. Substitute these values into the formula: V = 15 V - (85 A × 0.04 Ω). First, calculate the voltage drop across the internal resistance: Ir = 85 × 0.04 = 3.4 V. Now, calculate the terminal voltage: V = 15 V - 3.4 V = 11.6 V. Therefore, the terminal voltage of the battery when the starter is on is 11.6 V.

Answer

3.4 V

Answer

11.6 V

Answer

12 V

Answer

12.5 V

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