a suspended- coil vanometer
a moving-cell ammeter
a d.c generator
an electric motor
an induction coil,
Correct answer is C
No explanation has been provided for this answer.
Construct a quadratic equation whose roots are \(-\frac{1}{2}\) and 2.
3x2-3x+2=0
3x2+3x-2=0
2x2+3x-2=0
2x2-3x+2=0
2x2-3x-2=0
Correct answer is E
If x = \(-\frac{1}{2}\) and 2; then
\(x + \frac{1}{2} = 0\) and \(x - 2 = 0\)
\(\implies (x + \frac{1}{2})(x - 2) = 0\)
\(x^2 - 2x + \frac{1}{2}x - 1 = 0\)
\(x^2 - \frac{3}{2}x - 1 = 0\)
\(2x^2 - 3x - 2 = 0\)
0.15 A
0.20 A
0.60A
3.00A
6.67 A
Correct answer is A
No explanation has been provided for this answer.
Factorize the expression 2y\(^2\) + xy - 3x\(^2\)
2y (y + x) - 3x2
(2y - x)(2y + x)
(3x - 2y(x - y)
(2y + 3x)(y - x)
(x – y)(2y + 3x)
Correct answer is D
2y\(^2\) + xy - 3x\(^2\)
2y\(^2\) + 3xy - 2xy - 3x\(^2\)
y(2y + 3x) - x(2y + 3x)
= (y - x)(2y + 3x)
Birds can perch safely on overhead electric power cables without being electrocuted because
birds can withstand high p.d. of the electric power cables
any accumulated charge on the birds is quickly dissipated
the feet of the birds are well insulated
the current is a.c. and has particular direction
there is no p.d between the birds and the cables
Correct answer is C
No explanation has been provided for this answer.