Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
45 m
80 m
15 m
60 m
Correct answer is C
Refraction index (n)= (Real depth)/App. depth
For 80 m Real depth: (4)/3 = (80)/App. depth
App. dept = (80 x 3)/4 = 60 m
For 60 m real depth; (4)/3 = (60)/ App. depth
App. depth = (60 x 3)/4 = 45 m
∴change in App. depth = 60 -45 = 15 m
An object placed 10cm from a concave mirror of focal length 5cm would have its image
at the centre of convature
at the radius of curvature
at infinity
10 cm from the focus
Correct answer is A
No explanation has been provided for this answer.
A p-n junction diode is used as?
a rectifier in a d.c circuit
an amplifier in d.c circuit
an anplifier in an a.c circuit
a rectifier in an a.c circuit
Correct answer is D
No explanation has been provided for this answer.
boron and antimony
boron and sodium
aluminium and indium
arsenic and antimony
Correct answer is D
An n- type semi conductor is usually formed by dopping the semi conductor(a four valent element)with a five valent
element.(arsenic and antimony)
II,III and IV only
I, II and IV only
I,II and III only
I, III and IV only
Correct answer is C
No explanation has been provided for this answer.