The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10 Ω is
1
0.2Ω
2
0.5Ω
3
0.8Ω
4
1.0Ω
Official Solution
Correct Option: (2)
The correct option is (B): 0.5Ω
02
PYQ 2013
medium
physicsID: neet-ug-
The resistances of the four arms P, Q, R and S in a Wheatstone's bridge are 10 ohm, 30 ohm, 30 ohm and 90 ohm, respectively. The e.m.f. and internal resistance of the cell are 7 volt and 5 ohm respectively. If the galvanometer resistance is 50 ohm, the current drawn from the cell will be
1
1.0 A
2
0.2 A
3
0.1 A
4
2.0 A
Official Solution
Correct Option: (2)
The correct option is (B): 0.2 A
03
PYQ 2018
medium
physicsID: neet-ug-
In the circuit shown in the figure, the input voltage Vi is 20V, VBE = 0 and VCE = 0. The values of IB , IC and β are given by
1
IB=40\mu A, IC=10mA, \beta =250
2
IB=20\mu A, IC=5mA, \beta =250
3
IB=25\mu A, IC=5mA, \beta =200
4
IB=40\mu A, IC=5mA, \beta =125
Official Solution
Correct Option: (4)
To determine the values of , , and , we analyze the given transistor circuit.
