An aeroplane is travelling horizontally at a height of 2000 m from the ground. The aeroplane, when at a point P, drops a bomb
to hit a stationary target Q on the ground. In order that the bomb hits the target, what angle θ must the line PQ make with the vertical ? [g = 10ms^–2]

1)  15°
2) 30°
3) 90°
4) 45°

The electric field in a region of space is given by E^→ = E_oî + 2E_oj^ E where Eo=100N/C. The flux of this field through a circular surface of radius 0.02 m parallel to the Y-Z plane is nearly :

1) 0.125Nm²/C
2) 0.02Nm²/C
3)  0.005Nm²/C
4) 3.14Nm²/C

A net force of 10. newtons accelerates an object at 5.0 meters per second2. What net force would be required to accelerate the same object at 1.0 meter per second2?
 
1)  1.0 N
2)  2.0 N
3)  5.0 N 
4)  50. N

The distance between the slit and biprism and that between biprism and screen are each 50 cm. The obtuse angle of the briprism is 170^o and its refractive index is 1.5. If the fringe width is 0.0135 cm; calculate the wavelength of light in nm

1) 589 nm
2) 5890nm
3) 1890nm
4) 2890nm

A 1,200-kilogram car traveling at 10. meters per second hits a tree and is brought to rest in 0.10 second. What is the magnitude of the average force acting on the car to bring it to rest?
 
 1) 1.2 × 10²N
 2) 1.2 × 10³N
 3) 1.2 × 10⁴N
 4) 1.2 × 10⁵N

In which of the following heat loss is primarily not due to convection.

 Of which the velocity is equal to light velocity :

(1) cathode ray
(2) X-rays
(3) positive ray
(4) all

Two charges of 50μC and 100μC1 are separated by a distance of 0.6 m0.6 m. The intensity of electric field at a point midway between them is :

1) 50 ×10⁶V/m
2) 5 ×10⁶V/m
3) 10 ×10⁶V/m
4) 10 ×10^-6V/m

Which of the following series in the spectrum of hydrogen atom lies in the visible region of the electromagnetic spectrum?

1) Paschen series
2) Balmer series
3) Lyman series
4) Brackett series

 A 100 kg person stands on a scale in an elevator. What does the scale read when the elevator is accelerating upward at 1.0 m/s².

1) 110N  

2) 900N

3) -100N

4) 1100N