Physics-
General
Easy
Question
In the shown circuit, what is the potential difference across A and B
- 50 V
- 45 V
- 30 V
- 20 V
The correct answer is: 20 V
Because cell is in open circuit.
Related Questions to study
Physics-
Two batteries of e.m.f. 4V and 8 V with internal resistances 1 W and 2 W are connected in a circuit with a resistance of 9 W as shown in figure. The current and potential difference between the points P and Q are
Two batteries of e.m.f. 4V and 8 V with internal resistances 1 W and 2 W are connected in a circuit with a resistance of 9 W as shown in figure. The current and potential difference between the points P and Q are
Physics-General
Physics-
Two resistances 
and 
are joined as shown in the figure to two batteries of e.m.f. 
and 
. If is short-circuited, the current through is
Two resistances and are joined as shown in the figure to two batteries of e.m.f. and . If is short-circuited, the current through is
Physics-General
Physics-
If 
in the given figure, then resistance X will be
If in the given figure, then resistance X will be
Physics-General
Physics-
Consider the circuit shown in the figure. The current 
is equal to
Consider the circuit shown in the figure. The current is equal to
Physics-General
Physics-
The current in the arm CD of the circuit will be
The current in the arm CD of the circuit will be
Physics-General
Physics-
A battery of e.m.f. E and internal resistance r is connected to a variable resistor R as shown here. Which one of the following is true
A battery of e.m.f. E and internal resistance r is connected to a variable resistor R as shown here. Which one of the following is true
Physics-General
Physics-
The figure shows a network of currents. The magnitude of currents is shown here. The current i will be
The figure shows a network of currents. The magnitude of currents is shown here. The current i will be
Physics-General
Physics-
The internal resistances of two cells shown are 
and 
. If 
, the potential difference across the cell
The internal resistances of two cells shown are and . If , the potential difference across the cell
Physics-General
Physics-
n identical cells each of e.m.f. E and internal resistance r are connected in series. An external resistance R is connected in series to this combination. The current through R is
n identical cells each of e.m.f. E and internal resistance r are connected in series. An external resistance R is connected in series to this combination. The current through R is
Physics-General
Physics-
In the circuit shown, A and V are ideal ammeter and voltmeter respectively. Reading of the voltmeter will be
In the circuit shown, A and V are ideal ammeter and voltmeter respectively. Reading of the voltmeter will be
Physics-General
Physics-
In the circuit shown, potential difference between X and Y will be
In the circuit shown, potential difference between X and Y will be
Physics-General
Physics-
The figure below shows currents in a part of electric circuit. The current i is
The figure below shows currents in a part of electric circuit. The current i is
Physics-General
Physics-
The magnitude and direction of the current in the circuit shown will be
The magnitude and direction of the current in the circuit shown will be
Physics-General
Physics-
In the adjoining circuit, the battery has an e.m.f. of 
and zero internal resistance while the battery E has an e.m.f. of 2volt. If the galvanometer G reads zero, then the value of the resistance X in ohm is
In the adjoining circuit, the battery has an e.m.f. of and zero internal resistance while the battery E has an e.m.f. of 2volt. If the galvanometer G reads zero, then the value of the resistance X in ohm is
Physics-General
Physics-
In the given circuit, the voltmeter records 5 volts. The resistance of the voltmeter in ohms
In the given circuit, the voltmeter records 5 volts. The resistance of the voltmeter in ohms
Physics-General
