Q. No.
In the circuit shown, if a conducting wire is connected between points A and B, the current in this wire will: (All resistance given in ohms)
1. flow from A to B
2. flow in the direction which will be decided by the value of V
3. be zero
4. flow from B to A
2. flow in the direction which will be decided by the value of V
3. be zero
4. flow from B to A
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
If voltage across a bulb rated 220 V-100 W drops by 2.5% of its rated value, the percentage of the rated value by which the power would decrease is :
1. 20%
2. 2.5%
3. 5%
4. 10%
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
2. 3
3. 61
4. 6
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
The resistance of an ammeter is 13 Ω and its scale is graduated for a current up-to 100 A. After an additional shunt has been connected to this ammeter it becomes possible to measure currents up-to 750 A by this meter. The value of shunt resistance is:
1. 20
2. 2
3. 0.2
4. 2 k
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
A transformer is used to light a 100 W and 110 V lamp from a 220 V mains. If the main current is 0.5 A, the efficiency of the transformer is approximately :
1. 30%
2. 50%
3. 90%
4. 10%
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F. because the method involves:-
1. Potential gradients
2. A condition of no current flow through the galvanometer
3. A condition of cells, galvanometer, and resistances
4. Cells
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
The potential difference between the points A and B in the given figure is :
1. -3V
2. +3V
3. +6V
4. +9V
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
1. 1.2 times, 1.1 times
2. 1.21 times, same
3. both remain the same
4. 1.1 times, 1.1 times
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
2. current
3. drift velocity
4. electric field
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
2. 0.1 A
3. 2.0 A
4. 1.0 A
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 14 chapters you need to be enrolled in MasterClass Course.
© 2025 GoodEd Technologies Pvt. Ltd.