Example 3: Using Kirchhoff's rules determine the value of unknown resistance R in the circuit shown in Fig. 2(b). 14(a) so that no current flows through 4Ω resistance. Also find the potential difference between A and D.
Using Kirchhoff's rules determine the value of unknown resistance R in the circuit shown in Fig. 2(b). 14(a) so that no current flows through 4Ω resistance. Also find the potential difference between A and D.
Example 3: Using Kirchhoff's rules determine the value of unknown resistance R in the circuit shown in Fig. 2(b). 14(a) so that no current flows through 4Ω resistance. Also find the potential difference between A and D.
Using Kirchhoff's rules determine the value of unknown resistance R in the circuit shown in Fig. 2(b). 14(a) so that no current flows through 4Ω resistance. Also find the potential difference between A and D.
Using Kirchhoff's rules determine the value of unknown resistance R in the circuit shown in Fig. 2(b). 14(a) so that no current flows through 4Ω resistance. Also find the potential difference between A and D.
vhollow / vsolid
(A) X 1 (B) (C) (D)
Q.4. A trolley of mass 20 kg carries 16 kg grain and moves on a horizontal smooth and straight track at 20 m. If the grain starts leaking out of a hole at the bottom at time t = 0 s at the rate of 0.5 kgs-1, the speed of the trolley at t = 22 s will be nearly
A. 13.5 m
B. 15 m
C. 24 m
D. 26 m
Q.48. A rectangular coil of 300 turns has an average area of 25 cm 10 cm. The coil rotates with a speed of 50 cps in a uniform magnetic field of strength 4 about an axis perpendicular to the field. The peak value of the induced emf is (in volt)
1) 3
2) 30
3) 300
4) 3000
Q.14. A bus begins to move with an acceleration of 1 m. A man who is 48 m behind the bus starts running at 10 m to catch the bus. The man will be able to catch the bus after
(a) 6 s
(b) 5 s
(c) 3 s
(d) 7 s
(e) 8 s