Projectiles and Charged Particles

Projectile 1

100

The path of a projectile is called __________ .

Trajectory

200

Two rocks are dropped from the top of a cliff at the same time. Rock 1 falls straight down while Rock 2 follows a curved path. Which one them will hit the ground first?

Both will hit the ground at the same time

300

A particle P is projected with velocity u₁ at an angle of 30 degrees with the horizontal. Another particle Q is thrown vertically upwards with velocity u₂ from a point vertically below the highest point of the path of P. The necessary condition for the two particles to collide at the highest point is:

a. u₁=u₂

b. u₁=2u₂

c. u₁=4u₂

d. u₁=u₁u₂

u₁=2u₂

400

The ceiling of a long hall is 25 m high. What is the maximum horizontal distance that a ball thrown with a speed of 40 m/s can go without hitting the ceiling of the hall? Approximately, the answer is:

a. between 155m-160m

b. between 145m-155m

c. between 98m-130m

between 145m-155m

150.7m

500

An object is projected with a velocity of 20 m/s. making an angle of 45º with horizontal. The equation of trajectory is y = Ax – Bx², where A and B are constants. The ratio A: B is:

a. 1:5  

b. 5:1

c. 40:1

d. 1:40

40:1

Projectile 2

100

The minimum velocity that a moving body (such as a rocket) must have to move out from the gravitational field of a celestial body (such as the earth) is called ___________ velocity.

escape

200

Alex drops a ball from rest from the top of a 100-meter high cliff. How much time will it take for the ball to reach the ground? Take g=10 m/s²

a. 7.74s

b. 4.47s

c. 3.34s

d. 4.54s

4.47s

300

F=mg-cv⁴ is the general form of:

Quadratic Air Resistance

400

The projection speed of a projection is 10 ms–1. Neglecting air effects and taking g = 10 m/s², its horizontal range is found to be 5m. Calculate the angle(s) of projection. angle=x

a. x=25º

b. x=15º

c. x=35º

x=15º

500

For a given velocity, a projectile has the same range R for two angles of projection. If t1 and t2 are the times of flight in the two cases, then t_1.t₂ is proportional to:

a. R   

b. R³

c. R²

d. R.cos(x) 

R

Charged Particles 1

100

An electroscope detects:

Static Electricity

200

According to equation r = (mv)⁄(Be), faster-moving particles

a. move in a smaller circle

b. move straight

c. move in a bigger circle

d. move randomly

 

move in a bigger circle

300

The SI unit of the magnetic flux density is _______.

Tesla

400

SI unit of magnetic flux is ___________.

Weber

500

Quantity that is not affected by magnetic field is

a. moving charge

b. change in magnetic flux

c. current flowing in conductor

d. stationary charge

stationary charge

Charged Particles 2

100

A charge resulting from contact between objects is called charging by ___________ .

Conduction

200

The direction of conventional current is 

a. the direction of neutron flow

b. the direction of electron flow

c. the direction of flow of positive charge

d. same as that of electric current

the direction of flow of positive charge

300

For an electron, the magnitude of the force on it is:

a. BeV

b. eV

c. Be

d. BV

BeV

400

The force on a charge moving in a magnetic field is called _______________.

Lorentz force

500

If the flow of electric current is parallel to the magnetic field, the force will be

a. f_d

b. max

c. negative

d. zero

zero