If $3$ is a root of $x^2+kx-24=0$,then it is also a root of which of the following equations?

Two resistances of $400 \ \Omega$ and $800 \ \Omega$ are connected in series with a $6 \ V$ battery of negligible internal resistance. $A$ voltmeter of resistance $10,000 \ \Omega$ is used to measure the potential difference across the $400 \ \Omega$ resistor. The error in the measurement of the potential difference in volts is approximately:

For a transistor,the current amplification factor $\alpha$ is $0.8$. The transistor is connected in a common emitter configuration. The change in the collector current when the base current changes by $6 \, mA$ is ..... $mA$.

The biquadratic equation,two of whose roots are $1+i$ and $1-\sqrt{2}$,is

Which of the following pairs of transition metal ions have the same calculated values of magnetic moment?

Sexual reproduction leads to