A. Less than the critical size

C. Equal to the critical size

D. All of above can build up a change reaction

B. B and C have equal antiseptic propertie

C. ?-rays

D. ?-rays

A. Two angle

B. No angle

C. One angle

A. Polymers

B. Brittle

D. Amorphous

A. none of these

B. area

D. power

B. BINA tana

C. BINA sina

D. BINA cosa

A. 7?

C. 7?

D. 1?

A. be rotating

B. comes to rest after rotation

D. vibrating like galvanometer needle

A. The peak value of the current

B. The exact value of the current

D. The net value of the current

A. Nothing

C. Neutrons

D. Protons

A. Has magnitude 2

B. Has direction 45 with an x-axis

C. Has magnitude 2 and direction =45 with a y-axis

A. Momentum

B. All

C. Energy

B. Nm2Kg2

C. None

D. Nm2Kg-2

A. Charcoal

B. Water

D. Milk

A. total momentum remains constant

C. P E remains constant

D. K E remain constant

A. 4 seconds

B. 3 seconds

C. 6 seconds

B. P = 1 /2?V2 = ?gh = constant

C. V2 = 2g (h1-h2)

D. A1 V1 = A2 V2 = constant

A. 99 cm

C. 100 cm

D. 98 cm

A. Mega

B. Deca

C. Beta

A. F=ma

B. All above

C. F=?p/It

B. All the above reasons

C. Kinetic energy is large

D. Penetrating power is high

A. data is insufficient

C. 66.25x1023N-s

D. 662.5x1023N-s

A. 5

B. 2

D. 4

A. Vibration S-2

C. Radian

D. ms-1

A. Equal to the square of damping force

C. Directly proportional to the damping force

D. Equal to the square of damping force

A. annihilation of matter

C. Compton effect

D. pair production

A. Amplitude of vibration

B. Energy of vibration

D. Neither amplitude nor energy

A. The square root of amplitude

C. The amplitude

D. Reciprocal of amplitude

B. equal to its rest mass

C. zero

D. double of its rest mass

A. Galileo

B. Plank

D. Einstein

A. Deriving a possible formula

B. Verification of laws

D. Checking the homogeneity of a physical equation

B. 76.9

C. 76.8

D. None of these

A. virtual and erect

B. real and inverted

D. real and erect

A. Very high

C. High

D. Some time high and some time low

A. Source of electromagnetic waves

B. Deflecting charged particle

C. Electromagnetic gun

B. 5th orbit

C. 2nd orbit

D. 3rd orbit

A. 45

C. 0

D. 180

B. Its length

C. Square of its length

D. Its mass

A. Highly precise instrument

B. Conduct at room temperature

C. Count number of vibration

A. middle between the mean and extreme position on the right side

C. middle between the mean and extreme position on the left side

D. extreme position

A. Decimal

B. Reciprocal

C. Powers of two

A. Division of their absolute uncertainties

C. The difference of their absolute uncertainties

D. The product of their absolute uncertainties

A. Polarization

B. Refraction

D. Interference

A. focus

C. 2 f

D. zero

B. Rigid

C. Of rubber

D. Of glass

A. Mean position

B. In between mean and extreme

D. Extreme position

A. Only (i)

B. Only (ii)

D. Both (i) and (ii)

A. galvanometer

B. interferometer

D. none of these

A. 1/2 mvmax2-hf = ?

B. All of above are correct

C. 1/2 mvmax2=hf+?

A. 4

B. 1

D. 2