AIEEE Physics Test 4 [Test]

Jump To Content

Person

AIEEE Physics Test 4

Correct	Answer Text
	$\sqrt {2gl/\cos \emptyset_{\circ}}$
	none
	$\sqrt {2gl}$
	$\sqrt {2gl \sin \emptyset_{\circ}}$

Two projectile are launched from (0,0) at projection angle $\alpha_1$ and $\alpha_2$ with same speed. Taky Y-axis pointing upward and X-axis horizontal. Each projectile has the acceleration due to gravity. The locus of one $(\alpha_1)$ with respect the other $\alpha_2$ projectile will be

Answers

Correct	Answer Text
	none
	y = x
	$y=\big(\frac {\sin \alpha_1- \sin \alpha_2}{\cos \alpha_1-\cos \alpha_2}\big)x$
	$y=x(\tan \alpha_1-\tan \alpha_2)$

Question

A light rigid triangle is fixed to a cart of mass M free to move horizontally. A bead of mass m is released from the left corner of triangle. The acceleration 'a' of the cart will be

Answers

Correct	Answer Text
	g
	$\frac {\sqrt{3}}{7}g$
	$-\frac {\sqrt{3}}{7}g$
	zero

Question

A uniform rod of length l rests on a smooth horizontal table. An impulsive force acts on the rod at a distance x from its centre of mass. If the farther end from the action point of the force receives no velocity the value of x will be

Answers

Correct	Answer Text
	l/6
	none of these
	l/18
	l/2

Question

A hypothetical planet produces gravitational field intensity g=-jg_0(1+x/l)

. A uniform rod of length L lies between x=0 and x=L. The distance between centre of mass and the centre of gravity of the rod will be

Answers

Correct	Answer Text
	L/2
	L/18
	0
	L/4

Question

In carbon-nitrogen nuclear fusion cycle, protons are fused to form a helium nucleus. Positrons releases some energy. The number of protons fused and the number of positrons released in this process respectively are

Answers

Correct	Answer Text
	2, 4
	4, 2
	4, 4
	4, 6

Question

A piece of copper and another of germanium are cooled from room temperature to 80 k. The resistance of

Answers

Correct	Answer Text
	copper decreases and germanium increases
	each of them decreases
	copper increases and germanium decreases
	each of them increases

Question

The activity of a radioactive element decreases to one third of the original activity l_0

in a period of nine years. After a further lapse of nine years its activity will be

Answers

Correct	Answer Text

Question

A beam of light of wavelength 600 mm from a distance source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2m away. The distance between the first dark frings on either side of the central bright frings is

Answers

Correct	Answer Text
	2.4 cm
	1.2 mm
	2.4 mm
	1.2 cm

Question

A convex lens a of focal length 20 cm and a concave lens B of focal length 5 cm are kept along the same axis with a distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam then the distance d in cm will be

Answers