A block of mass 5 kg is moving horizontally at a speed of 1.5 m/s. A perpendicular force
A block of mass 5 kg is moving horizontally at a speed of 1.5 m/s. A perpendicular force of 5 N acts on it for 4 sec. What will be the distance of the block […]
Physics
Two springs with spring constants K₁=1500 N/m and K₂=3000 N/m
Two springs with spring constants K₁=1500 N/m and K₂=3000 N/m are stretched by the same force. The ratio of potential energy stored in springs will be
Options
(a) 1:2 (b) 2:1 (c) 4:1 […]
If R is the radius of earth, the height at which the weight of a body 1/4 of its weight
If R is the radius of earth, the height at which the weight of a body 1/4 of its weight on the surface of earth.
Options
(a) R (b) 2R (c) R/2 (d) […]
A satellite A of mass m is at a distance r from the centre of earth. Another satellite
A satellite A of mass m is at a distance r from the centre of earth. Another satellite B of mass 2m is at a distance 2r from the earth centre. Their time periods are […]
A particle of mass 1.96×10⁻¹⁵ kg is kept in equilibrium between two horizontal metal
A particle of mass 1.96×10⁻¹⁵ kg is kept in equilibrium between two horizontal metal plates having potential difference of 400V seperated apart by 0.02m. Then the charge on the particle is (e=electronic charge)
Options […]
A battery charges a parallel plate capacitor seperated by distance(d) so that the energy
A battery charges a parallel plate capacitor seperated by distance(d) so that the energy (V₀) is stored in the system. A slap of dielectric constant (K) and thickness(d) is then introduced between the plates of […]
Pure Si at 300 k has equal electrons (nₑ) and hole (nh) concentrations
Pure Si at 300 k has equal electrons (nₑ) and hole (nh) concentrations of 1.5×10⁺¹⁶ m⁻³. Dopping by indium, nh increases to 3×10²² m⁻³. What is nₑ in doped Si?
Options
(a) 2.5×10⁹ […]
Which gate can be obtained by shorting both the input terminals of a NOR gate?
Which gate can be obtained by shorting both the input terminals of a NOR gate?
Options
(a) NOT (b) OR (c) AND (d) NAND
Correct Answer:
NOT
Explanation:
No explanation available. Be the […]
In case of linearly polarised light, the magnitude of the electric field vector
In case of linearly polarised light, the magnitude of the electric field vector
Options
(a) does not change with time (b) varies periodically with time (c) is parallel to the direction of propagation […]
A coil of inductive reactance 31 Ω has a resistance of 8 Ω. It is placed in series
A coil of inductive reactance 31 Ω has a resistance of 8 Ω. It is placed in series with a condenser of capacitative reactance 25 Ω. The combination is connected to an a.c. source of […]