KCET 2023 | Current Electricity Question 1 | Physics

A wire of resistance $$R$$ is connected across a cell of emf $$(\varepsilon)$$ and internal resistance $$(r)$$. The current through the circuit is $$I$$. In time $$t$$, the work done by the battery to establish the current $$I$$ is

$$\varepsilon I t$$

$$\frac{\varepsilon^2 t}{R}$$

$$IRt$$

$$I^2 R t$$

KCET 2023

MCQ (Single Correct Answer)

-0

For a given electric current the drift velocity of conduction electrons in a copper wire is $$v_d$$ and their mobility is $$\mu$$. When the current is increased at constant temperature

$$v_d$$ increases, $$\mu$$ remains the same

$$v_d$$ remains the same, $$\mu$$ increases

$$v_d$$ decreases, $$\mu$$ remains the same

$$v_d$$ remains the same, $$\mu$$ decreases

KCET 2023

MCQ (Single Correct Answer)

-0

Ten identical cells each emf $$2 \mathrm{~V}$$ and internal resistance $$1 ~\Omega$$ are connected in series with two cells wrongly connected. A resistor of $$10 ~\Omega$$ is connected to the combination. What is the current through the resistor?

1.8 A

2.4 A

0.6 A

1.2 A

KCET 2023

MCQ (Single Correct Answer)

-0

The equivalent resistance between the points A and B in the following circuit is

KCET 2023 Physics - Current Electricity Question 31 English

0.5 $$\Omega$$

5.5 $$\Omega$$

0.05 $$\Omega$$

5 $$\Omega$$

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