A network of six identical capacitors, each of value C, is made as shown in the figure.
The equivalent capacitance between the points A and B is
3C/4
3C/2
3C
The amplitude of the sinusoidially oscillating electric field of a plane wave is 60 V/m. Then the amplitude of magnetic field is
2 × 102 T
6 × 107 T
6 × 102 T
2 × 10-7 T
The ratio of the resistance of conductor at temperature 15°C to its resistance at temperature 37.5°C is 4 : 5. The temperature coefficient of resistance the conductor is
Find the potential at the centre of a square of side m which carries at its four corners charges q1 = 3 × 10-6 C, q2 = − 3 × 10-6 C, q3 = − 4 × 10-6 C, q4 = 7 × 10-6 C
2.7 × 104 V
1.5 × 103 V
3 × 102 V
5 × 103 V
A short solenoid of length 4 cm, radius 2 cm and 100 turns is placed inside and on the axis of a long solenoid of length 80 cm and 1500 turns. A current of 3 A flows through the short solenoid. The mutual inductance of two solenoids is
2.96 × 10-4 H
5.3 × 10-5 H
3.52 × 10-3 H
8.3 × 10-5 H
In Young's experiment, using red light (A = 6600 ), 60 fringes are seen in the field of view. How many fringes will be seen by using violet light (A = 4400 ) ?
10
20
45
90
D.
90
Usin red light () 60 fringes are seen.
Hence, range of field of view is
Using light of wavelength λ' , n fringes are seen, then
The range of frequencies allotted for FM radio is
88 to 108 kHz
88 to 108 MHz
47 to 230 kHz
47 to 230 MHz
The binding energy per nucleon for deuteron and helium are 1.1 MeV and 7.0 MeV. The energy released when two deuterons fuse to form a helium nucleus is
23.6 MeV
2.2 MeV
30.2 MeV
3.6 MeV
The surface area ofa black body is 5 x 10-4 m2 and its temperature is 727°C. The energy radiated by it per minute is (σ = 5.67 × 10-8 J/m2 s-k4)
1.7 × 103 J
2.5 × 102 J
8 × 103 J
3 × 104 J
The inputs and outputs for different time intervals are given below the NAND gate
The values taken by P, Q, R, S are respectively
1, 1, 1, 0
0, 1, 0, 1
0, 1, 0, 0
1, 0, 1, 1