BISE Multan · Class 12 · Physics · 2026 · First Annual · Group 1

The gradient of the scalar field is always be:

Electron volt is unit of:

A thermistor is a heat sensitive:

An ammeter is connected in a circuit to measure current in:

An electric circuit in CRO that provides voltage to X plates is called:

When current flowing through an inductor is doubled, then energy stored in it becomes:

If $V=63\mathrm{Cis}(100\pi t+{60}^{\circ })$, then frequency of rotation of generator coil is:

The FM transmission frequency ranges between:

Which one of the given electromagnetic waves have shortest wavelength?

A device used to detect weak magnetic field produced by brain is:

$X=A+B$ is mathematical notation for the output of:

The gain of an op-amp depends only on resistance which are connected:

If temperature of black body is doubled then energy radiated per sec per square meter becomes:

To black body radiation, intensity verser wavelength graph, by increasing temperature ${\lambda }_{\max }$ shifts to:

The common type of He-Ne laser contain helium:

A pair of quark and antiquark makes a:

The unit of absorbed dose is gray =

Do electrons tend to go to region of high potential or of low potential?

How can you identify that which plate of a capacitor is positively charged?

The time constant of a series $RC$ circuit is $t=RC$. Verify that an ohm times farad is equivalent to second.

Suppose that you follow an electric field line due to a positive point charge. Do electric field and the potential increase or decrease?

A loop of wire is suspended between the poles of a magnet with its plane parallel to the pole faces. What happens if a direct current is put through the coil? What happens if an alternating current is used instead?

What do you know about Pivoted type galvanometer? Explain.

Why the resistance of an ammeter should be very low?

A current in a conductor produces a magnetic field, which can be calculated using Ampere’s law. Since current is defined as the rate of flow of charge, what can you conclude about the magnetic field due to stationary charges? What about moving charges?

What do you understand by “background radiation”? State two sources of this radiation.

Why are heavy nuclei unstable?

Explain how $\alpha$ and $\beta$-particles may ionize an atom without directly hitting the electrons? What is the difference in the action of the two particles for producing ionization?

How James Chadwick discovered neutron in $1932$? State the nuclear reaction.

Discuss four main types of Sources of Current.

What is meant by Electroplating?

A potential difference is applied across the ends of a copper wire. What is the effect on the drift velocity of free electrons by (i) increasing the potential difference (ii) decreasing the length and temperature of the wire

Define peak to peak value of Alternating Voltage.

When $10V$ are applied to an AC circuit, the current flowing in it is $100mA$. Find its impedance.

A sinusoidal current has rms value of $10A$. What is the maximum or peak value?

How Magnetic Resonance imaging works?

Define Stress and Strain. What are their SI units?

Discuss the mechanism of electrical conduction by holes and electrons in a pure semiconductor element.

What is a Transistor? Write the name of its two types.

Draw the truth tables of NOR and NAND gates.

Why ordinary silicon do not emit light?

How would you position a flat loop of wire in a changing magnetic field so that there is no $emf$ induced in the loop?

Can a DC motor be turned into a DC generator? What changes are required to be done?

Show that $\mathcal{E}$ and $\frac{\mathrm{\Delta }\varphi }{\mathrm{\Delta }t}$ have same units.

Can pair production take place in vacuum? Explain.

When light shines on a surface, is momentum transferred to the metal surface?

When does light behave as a wave? When does it behave like a particle?

Why don’t we observe a Compton effect with visible light?

Is energy conserved when an atom emits a photon of light?

What are the advantages of lasers over ordinary light?

State and prove Kirchhoff’s Second Rule.

Find the electric field strength required to hold a suspended particle of mass $1.0\times {10}^{-6}kg$ and charge $1.0\mu C$ between two plates $10.0cm$ apart.

Derive an expression for energy stored in an inductor.

A power line $10.0m$ high carries a current $200A$. Find the magnetic field of the wire at the ground.

Describe the behaviour of A.C through an inductor. Also show that the reactance of an inductor depends upon the frequency of A.C and inductance.

In a certain circuit, the transistor has a collector current of $10mA$ and a base current of $40\mu A$. What is the current gain of the transistor?

Discuss the Postulates of special theory of relativity and explain the phenomenon of time dilation and length contraction.

A wire $2.5m$ long and cross section area ${10}^{-5}{m}^2$ is stretched $1.5mm$ by a force of $100N$ in elastic region. Calculate (i) Strain and (ii) Young’s Modulus

State Heisenberg’s uncertainty principle and use it to explain why an electron cannot be confined within nucleus of an atom.

Find mass defect and binding energy of deuteron nucleus. The experimental mass of deuteron is $3.3435\times {10}^{-27}kg$.