MCQ
Half life of radioactive element depends upon:
  • A
    Amount of element present.
  • B
    Temperature.
  • C
    Pressure.
  • D
    Nature of element.

Answer

  1. Nature of element.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Which of the following statement is false

(a) Heat produced in a conductor is proportional to its resistance

(b) Heat produced in a conductor is proportional to the square of the current

(c) Heat produced in a conductor is proportional to charge

(d) Heat produced in a conductor is proportional to the time for which current is passed

At breakdown voltage, the rate of creation of hole-electron pairs is _____ leading to the _______ in current. 

A beam of monochromatic blue light of wavelength 4200Å in air travels in water (μ = 4/3). Its wavelength in water will be

(a) 2800 Å

(b) 5600 Å

(c) 3150 Å

(d) 4000 Å

If the ammeter in the given circuit reads 2 A, the resistance R is

(a) 1 ohm

(b) 2 ohm

(c) 3 ohm                                          

(d) 4 ohm

Why is the screen of the cathode ray tube coated ? Name the material used for coating:

Electromagnetic radiation of highest frequency is

(a) Infrared radiations

(b) Visible radiation

(c) Radio waves

(d) g-rays

The resistance coils in a resistance box are made of double folded wire so that their.
The ratio of contributions made by the magnetic field and electric field components to the intensity of an EM wave is:

Two point charges 3 × 10–6 C and 8 × 10–6 C repel each other by a force of 6 × 10–3 N. If each of them is given an additional charge – 6 × 106 C, the force between them will be

(a) 2.4 × 10–3 N (attractive)

(b) 2.4 × 10–9 N (attractive)

(c) 1.5 × 10–3 N (repulsive)

(d) 1.5 × 10–3 N (attractive)

What is the time taken (in seconds) to cross a glass of thickness 4 mm and μ = 3 by light

(a) 4  

(b) 2  

(c) 16  

(d) 8