Physics questions
20027 published questions with worked solutions.
- Accuracy with a meter bridge is maximum, when the null point is obtained at the midpoint of the bridge wire. This is because
- With resistances P and Q in the left and right gaps of a meter bridge, the balance point divides the wire in the ratio 1/3. When...
- Two resistances of values 20 , and 30 , are connected in the left gap and right gap of metre bridge. What will be the null point...
- Two resistances are connected in the two gaps of a meter bridge. The balance point is 20 cm from the zero end. When a resistance...
- Unknown resistance is placed in left gap of a meter bridge and known resistance of 60 , in the right gap; and null point is...
- In a balanced metre bridge the segment of wire opposite to resistance 24 , is 48 cm the unknown resistance will be :
- An unknown resistance is put in left gap of metre bridge and resistance of 40 , in right gap. The null point is obtained 60 cm...
- Two equal resistances are put in the gaps of metre bridge the shift in the null point, when an equal resistance is connected in...
- The wire in metre bridge is made of magnanin because :
- In meter bridge, X and 2X resistances are connected in left and right gap respectively. The null point is obtained at :
- A cell sends current of 1 A through a circuit of resistance 5 , . The emf of cell of internal resistance 1 , will be :
- The balancing lengths for the cells of e. m. f. E_1 and E_2 are l_1 and l_2 respectively. If they are connected separately then
- The internal resistance of the cell can be determined by,
- The unit of potential gradient is
- In comparing e. m. f. of two cells by a potentiometer balance point is obtained on 5th wire, the current flowing through the wire...
- When null point is obtained in the potentiometer the current is drawn from
- The potentiometer wire of resistance R is connected in series with a cell of e. m. f. E and of internal resistance r along with...
- The current, in a potentiometer wire of 100 cm length, is adjusted to give a null point at 50 cm with a standard cell of e. m. f....
- The wire of potentiometer has resistance 4 , and length 1 m. It is connected to a cell of e. m. f. 2 V and internal resistance 1...
- A voltmeter has a resistance of 50 , is connected across a cell of e. m. f. 2 V and internal resistance 10 , . The reading of...