300j work is done in sliding a 2kg block up an inclined plane of height 10m
300j work is done in sliding a 2kg block up an inclined plane of height 10m.Taking g=10 ms⁻², work done against friction is
Options
(a) 200 j (b) 100 j (c) Zero (d) […]
Easy
If L and C denote inductance and capacitance,then the dimensions of L-C are
If L and C denote inductance and capacitance,then the dimensions of L-C are
Options
(a) [M⁰L⁰T²] (b) [M²L⁰T²] (c) [M⁰L²T²] (d) [ML²T²]
Correct Answer:
[M⁰L⁰T²]
Explanation:
Dimensions of Inductance(L) = ML²T⁻²A⁻²
Dimensions of Capacitance(C) = M⁻¹L⁻²T⁴A²
A machine gun fires 10 bullets/s,each of mass 10 g,the speed of each bullet
A machine gun fires 10 bullets/s, each of mass 10g, the speed of each bullet is 20 cms⁻¹, then force of recoil is
Options
(a) 200 dyne (b) 2000 dyne (c) 20 dyne (d) […]
A body of mass 0.25 kg is projected with muzzle velocity 100 m/s from a tank
A body of mass 0.25 kg is projected with muzzle velocity 100 m/s from a tank of mass 100 kg.What is the velocity of the tank?
Options
(a) 5 m/s (b) 25 m/s […]
A particle has initial velocity(3i⃗ +4j⃗)and has acceleration (0.4i⃗ +0.3j⃗)
A particle has initial velocity(3i⃗ +4j⃗)and has acceleration (0.4i⃗ +0.3j⃗). It’s speed after 10s is:
Options
(a) 7 units (b) 7√2 units (c) 8.5 units (d) 10 units
Correct Answer:
7√2 units
Explanation:
No […]
With what minimum acceleration can a fireman slide down a rope while breaking
With what minimum acceleration can a fireman slide down a rope while breaking strength of the rope is 2/3 of the weight?
Options
(a) 2/3 g (b) g (c) 1/3 g (d) Zero
Van der waals,equation of state is(p+a/v²)(V-b)=nRT. The dimensions of a and b
Van der waals,equation of state is(p+a/v²)(V-b)=nRT. The dimensions of a and b are
Options
(a) [ML³T²],[ML³T⁰] (b) [ML⁵T⁻²],[M⁰L³T⁰] (c) [M²LT²],[ML³T²] (d) [ML²T],[ML²T²]
Correct Answer:
[ML⁵T⁻²],[M⁰L³T⁰]
Explanation:
((p+a/v²)(V-b)) / nT =R
Since we have (p+a/v²), […]
An aeroplane flies 400m due to North and then 300m due to south and then flies
An aeroplane flies 400m due to North and then 300m due to south and then flies 1200m upwards, the net displacement is
Options
(a) greater than 1200 m (b) less than 1200 m (c) […]
The angle between the two vectors A = 3i+4j+5k and B = 3i+4j-5k will be
The angle between the two vectors A = 3i + 4j + 5k and B = 3i + 4j – 5k will be
Options
(a) 90ﾟ (b) 0ﾟ (c) 60 ﾟ (d) 45ﾟ
Correct […]
A particle is released from rest from a tower of height h, i.e,t₁ : t₂ : t₃ is
A particle is released from rest from a tower of height 3h, the ratio of time of fall for equal heights h (t₁ : t₂ : t₃ is)
Options
(a) √3 : √2 : 1 […]