EASY
12th Uttar Pradesh Board
IMPORTANT
Earn 100

Find the net e.m.f. of the three batteries shown in figure.


Question Image

25% studentsanswered this correctly

Important Questions on Current Electricity

EASY
12th Uttar Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Current Electricity>Exercise>Q 52
A cell of emf E is connected across a resistance R. The potential difference between the terminals of the cell is found to be V. Then the internal resistance of the cell must be
EASY
12th Uttar Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Current Electricity>Exercise>Q 53
A battery of emf 10 V and internal resistance 3 Ω is connected to an external resistor. The current in the circuit is 0.5 A. The terminal voltage of the battery when the circuit is close is
EASY
12th Uttar Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Current Electricity>Exercise>Q 54
A battery has an emf of 15 V and internal resistance of 1 Ω. Is the terminal to terminal potential difference less than, equal to or greater than 15 V, if the current in the battery is (1) from negative to positive terminal, (2) from positive to negative terminal and (3) zero current?
EASY
12th Uttar Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Current Electricity>Exercise>Q 55
A source of emf E=15 V and having negligible internal resistance, is connected to a variable resistance. So that, the current in the circuit increases with time as I=1.2t+3. Then, the total charge that will flow in first 5 s will be,
EASY
12th Uttar Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Current Electricity>Exercise>Q 56
In the circuit shown, the resistance of the ammeter A is negligible and that of the voltmeter V is very high. When the key K is open, the reading of
voltmeter is 1.53 V On closing the key, the reading of ammeter is 1.00 A and that of the voltmeter drops to 1.03 V Calculate emf of the cell.
Question Image
MEDIUM
12th Uttar Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Current Electricity>Exercise>Q 57
Two batteries of emfs 6.20 V and 12.45 Vand internal resistances 0.01 Ω and 0.03 Ω respectively are being charged by a battery charger which supplies a current of 20 A. What are the terminal potential differences of the batteries during charging?
Question Image
MEDIUM
12th Uttar Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Current Electricity>Exercise>Q 58
Is internal resistance a drawback of the cell? Does it remain constant?
EASY
12th Uttar Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Current Electricity>Exercise>Q 59
Does emf of a cell represent a force or potential energy or work done per unit charge? When will it be equal to the PD across the terminals of the cell?