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.
string theory
particle theory
group theory
band theory
Correct answer is D
No explanation has been provided for this answer.