EASY
12th CBSE
IMPORTANT
Earn 100

Three resistors , and each of are connected across a as shown in Fig. Find the total heat developed across the three resistors.


Important Questions on Current Electricity
MEDIUM
12th CBSE
IMPORTANT
A heating coil is connected in series with a resistance . The coil is dipped in a liquid of mass and specific heat . A potential difference of is applied and the temperature of the liquid is found to increase by in minutes. If is removed, the same rise in temperature is reached in minutes. Find the value of .

EASY
12th CBSE
IMPORTANT
A series battery of lead accumulators, each of emf and internal resistance is charged by a d.c. mains. To limit the charging current, a series resistance of is used in the charging circuit. What is (i) power supplied by the mains (ii) power dissipated as heat? Account for the difference in the two cases.

MEDIUM
12th CBSE
IMPORTANT
A series battery of lead accumulators, each of emf and internal resistance is charged by a d.c. mains. To limit the charging current, a series resistance of is used in the charging circuit. What is power dissipated as heat? Account for the difference in the two cases.

EASY
12th CBSE
IMPORTANT
A storage battery of emf , internal resistance , is being charged by a d.c. source, using a resistor in series in the circuit. Calculate the current in the circuit.

EASY
12th CBSE
IMPORTANT
A storage battery of emf , internal resistance , is being charged by a d.c. source, using a resistor in series in the circuit. Calculate the terminal voltage across the battery during charging.

EASY
12th CBSE
IMPORTANT
A storage battery of emf , internal resistance , is being charged by a d.c. source, using a resistor in series in the circuit. Calculate the chemical energy stored in the battery in minutes.

EASY
12th CBSE
IMPORTANT
The following graph shows the variation of terminal potential difference , across a combination of three cells in series to a resistor, versus the current, : Calculate the emf of each cell

EASY
12th CBSE
IMPORTANT
The following graph shows the variation of terminal potential difference , across a combination of three cells in series to a resistor, versus the current, : For what current , will the power dissipation of the circuit be maximum?
